A new CDC study found 5% of infants or fetuses born to women in the U.S. with laboratory-confirmed Zika infections had microcephaly or another Zika-linked birth defect.
"The bottom line is that Zika infection, identified during any trimester of pregnancy, can lead to serious brain and other birth defects," said Peggy Honein, an author on the study.
What they found: Infants developed microcephaly and other birth defects regardless of whether or not the mother displayed symptoms. The data also showed that babies infected in all trimesters exhibited birth defects, but the earlier the infection occurred, the more likely they were. Rates ranged from 8% for infants infected in the first trimester to 4% in the third.